def test_illegal_acknowledgement_packet_during_uninitialized_state(self):
packet = packets.AcknowledgementPacket(3)
conversation = TFTPConversation(self.client_host, self.client_port,
StubResponseRouterTwo())
response_packet = conversation.handle_packet(packet)
self.assertEqual(conversation.state, tftp_conversation.COMPLETED)
self.assertEqual(response_packet.__class__, packets.ErrorPacket)
self.assertEqual(response_packet.error_code, 5)
def test_no_action_for_writing(self):
packet = packets.WriteRequestPacket("example_filename", "netascii")
conversation = TFTPConversation(self.client_host, self.client_port,
NoActionAvailableResponseRouterStub())
response_packet = conversation.handle_packet(packet)
self.assertEqual(conversation.state, tftp_conversation.COMPLETED)
self.assertEqual(response_packet.__class__, packets.ErrorPacket)
self.assertEqual(response_packet.error_code, 2)
def test_out_of_lock_step_block_num(self):
packet = packets.DataPacket(2, "")
conversation = TFTPConversation(self.client_host, self.client_port,
StubResponseRouterTwo())
conversation.cached_packet = "stub packet"
conversation.state = tftp_conversation.WRITING
conversation.current_block_num = 3
response_packet = conversation.handle_packet(packet)
self.assertEqual(conversation.state, tftp_conversation.WRITING)
self.assertEqual(response_packet.__class__, packets.NoOpPacket)
def test_begin_reading(self):
packet = packets.ReadRequestPacket("example_filename", "netascii")
conversation = TFTPConversation(self.client_host, self.client_port, StubResponseRouter())
response_packet = conversation.handle_packet(packet)
self.assertEqual(conversation.state, tftp_conversation.READING)
self.assertEqual(conversation.filename, "example_filename")
self.assertEqual(conversation.mode, "netascii")
self.assertEqual(conversation.current_block_num, 1)
self.assertEqual(conversation.read_buffer.__class__, StubReadBuffer)
self.assertEqual(response_packet.__class__, packets.DataPacket)
self.assertEqual(conversation.cached_packet, response_packet)
def test_illegal_packet_type_during_writing_state(self):
packet = packets.AcknowledgementPacket(2)
conversation = TFTPConversation(self.client_host, self.client_port,
StubResponseRouterTwo())
conversation.cached_packet = "stub packet"
conversation.state = tftp_conversation.WRITING
conversation.read_buffer = StubReadBufferTwo()
response_packet = conversation.handle_packet(packet)
self.assertEqual(conversation.state, tftp_conversation.WRITING)
self.assertEqual(response_packet.__class__, packets.ErrorPacket)
self.assertEqual(response_packet.error_code, 0)
self.assertEqual(conversation.cached_packet, "stub packet")
def test_finish_reading(self):
packet = packets.AcknowledgementPacket(3)
conversation = TFTPConversation(self.client_host, self.client_port,
StubResponseRouterTwo())
conversation.filename = "example_filename"
conversation.state = tftp_conversation.READING
conversation.current_block_num = 3
conversation.read_buffer = StubReadBufferTwo()
response_packet = conversation.handle_packet(packet)
self.assertEqual(conversation.state, tftp_conversation.COMPLETED)
self.assertEqual(response_packet.__class__, packets.NoOpPacket)
self.assertEqual(conversation.cached_packet, response_packet)
def test_begin_writing(self):
packet = packets.WriteRequestPacket("example_filename", "netascii")
conversation = TFTPConversation(self.client_host, self.client_port,
StubResponseRouter())
response_packet = conversation.handle_packet(packet)
self.assertEqual(conversation.state, tftp_conversation.WRITING)
self.assertEqual(conversation.filename, "example_filename")
self.assertEqual(conversation.mode, "netascii")
self.assertEqual(conversation.current_block_num, 0)
self.assertEqual(conversation.write_buffer.__class__, WriteBuffer)
self.assertEqual(conversation.cached_packet, response_packet)
self.assertEqual(response_packet.__class__, packets.AcknowledgementPacket)
self.assertEqual(response_packet.block_num, 0)
def test_continue_reading(self):
packet = packets.AcknowledgementPacket(1)
conversation = TFTPConversation(self.client_host, self.client_port,
StubResponseRouterTwo())
conversation.state = tftp_conversation.READING
conversation.read_buffer = StubReadBufferTwo()
conversation.current_block_num = 1
response_packet = conversation.handle_packet(packet)
self.assertEqual(conversation.state, tftp_conversation.READING)
self.assertEqual(conversation.current_block_num, 2)
self.assertEqual(response_packet.data, "X" * 512)
self.assertEqual(response_packet.__class__, packets.DataPacket)
self.assertEqual(conversation.cached_packet, response_packet)
def test_finish_writing(self):
packet = packets.DataPacket(3, "O" * 511)
conversation = TFTPConversation(self.client_host, self.client_port,
StubResponseRouterTwo())
conversation.state = tftp_conversation.WRITING
conversation.write_buffer = WriteBuffer()
conversation.write_buffer.data = "X" * 512
conversation.filename = "stub_filename"
conversation.current_block_num = 2
write_action_wrapper = StubWriteActionWrapper()
conversation.write_action = write_action_wrapper.stub_action
response_packet = conversation.handle_packet(packet)
self.assertEqual(conversation.state, tftp_conversation.COMPLETED)
self.assertEqual(conversation.current_block_num, 3)
self.assertEqual(conversation.cached_packet, response_packet)
self.assertEqual(response_packet.__class__, packets.AcknowledgementPacket)
self.assertEqual(response_packet.block_num, 3)
# action should get invoked, saving this state in the wrapper class
self.assertEqual(write_action_wrapper.received_state,
("10.26.0.3", 12345, "stub_filename", "X" * 512 + "O" * 511))
